The outfielder has thus far been working on strengthening his core, but will soon progress to swinging and fielding drills. He will need a minor league rehab assignment to get his timing back, but could be able to return to the Nationals lineup in early August if he avoids any further setbacks.

Nate McLouth continues to experience soreness in his surgically-repaired right shoulder.

McLouth was placed on the disabled list before Opening Day with a torn labrum and he's obviously nowhere close to making his 2015 debut. Washington officially shifted the outfielder from the 15-day disabled list to the 60-day disabled list earlier this month.

Stephen Strasburg (oblique) will make another rehab start with Triple-A Syracuse on Monday.

Strasburg allowed three runs on four hits over four innings in his first rehab outing Wednesday. As long as he doesn't have a physical setback on Monday, he'll rejoin the Nationals' rotation late next week.

David Carpenter (shoulder) will be shut down for 2-3 days after being given a pain-killing injection.

An MRI on Carpenter's right shoulder showed no structural damage, but the shot was administered in hopes of getting the soreness out of there. There's no timetable for his return, although he shouldn't be out long.

This was done as nothing more than a procedural move to create a spot on the 40-man roster for Joe Ross who will start on Saturday. Stammen will miss the entire 2015 season after undergoing surgery to repair a torn right flexor tendon.